[dancing spawn of ungoliant]

since he really didn't have an epessë

Or we just don't know his epessë. Many elves had even three "official" names(if i remember right).

All i know about legolas's name is that las=leaf(at least in Quenya) and the rest should mean green. But that confuses me a bit since green=galen(or something like that) and i don't recognice that element from his name.

I have been wondering the name Isildur. There's obviously Isil(/Ithil)=the Moon and dur=tower -> Moontower?
Is my conclusion from the name all wrong?